diff --git a/include/llvm/ExecutionEngine/ExecutionEngine.h b/include/llvm/ExecutionEngine/ExecutionEngine.h
index c367040cd71..e3ef104aea8 100644
--- a/include/llvm/ExecutionEngine/ExecutionEngine.h
+++ b/include/llvm/ExecutionEngine/ExecutionEngine.h
@@ -196,9 +196,7 @@ public:
   /// resolve external symbols in objects it is loading.  If a symbol is found
   /// in the Archive the contained object file will be extracted (in memory)
   /// and loaded for possible execution.
-  virtual void addArchive(std::unique_ptr<object::Archive> A) {
-    llvm_unreachable("ExecutionEngine subclass doesn't implement addArchive.");
-  }
+  virtual void addArchive(std::unique_ptr<object::Archive> A);
 
   //===--------------------------------------------------------------------===//
 
diff --git a/lib/ExecutionEngine/ExecutionEngine.cpp b/lib/ExecutionEngine/ExecutionEngine.cpp
index ce20a02216f..0135a5285e7 100644
--- a/lib/ExecutionEngine/ExecutionEngine.cpp
+++ b/lib/ExecutionEngine/ExecutionEngine.cpp
@@ -125,6 +125,10 @@ void ExecutionEngine::addObjectFile(std::unique_ptr<object::ObjectFile> O) {
   llvm_unreachable("ExecutionEngine subclass doesn't implement addObjectFile.");
 }
 
+void ExecutionEngine::addArchive(std::unique_ptr<object::Archive> A) {
+  llvm_unreachable("ExecutionEngine subclass doesn't implement addArchive.");
+}
+
 bool ExecutionEngine::removeModule(Module *M) {
   for(SmallVectorImpl<Module *>::iterator I = Modules.begin(),
         E = Modules.end(); I != E; ++I) {